The Knox Network general wiki has lots of maths resources.

Integrating ICT into Maths learning.

Maths No Fear

Graeme Henchel's, (Yarra Valley Ultranet Coach)

Alison Mc Gregor from Scoresby SC has added this link.

Check out this cute maths wiki. from New Zealand with a really nice use of Voicethread

http://mmwhiz.wikispaces.com

Alan Thwaite's Blog, lots for secondary teachers.